title: Near-edge x-ray absorption fine structures revealed in core ionization photoelectron spectroscopy.
abstract: Simultaneous core ionization and core excitation have been observed in the C(2)H(2n) (n=1, 2, 3) molecular series using synchrotron radiation and a magnetic bottle time-of-flight electron spectrometer. Rich satellite patterns corresponding to (K(-2)V) core excited states of the K(-1) molecular ions have been identified by detecting in coincidence the photoelectron with the two Auger electrons resulting from the double core hole relaxation. A theoretical model is proposed providing absolute photoionization cross sections and revealing clear signatures of direct (monopolar) and conjugate (dipolar near-edge x-ray absorption fine structure) shakeup lines of comparable magnitude.
authors.affiliation: Department of Chemistry, Tokyo Institute of Technology, Tokyo 152855, Japan and Institute of Material Structural Science, Photon Factory, Tsukuba, Ibaraki 3050801, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Nakano
authors.forename: P
authors.initials: P
authors.lastname: Selles
authors.forename: P
authors.initials: P
authors.lastname: Lablanquie
authors.forename: Y
authors.initials: Y
authors.lastname: Hikosaka
authors.forename: F
authors.initials: F
authors.lastname: Penent
authors.forename: E
authors.initials: E
authors.lastname: Shigemasa
authors.forename: K
authors.initials: K
authors.lastname: Ito
authors.forename: S
authors.initials: S
authors.lastname: Carniato
mesh_terms: D006838:Hydrocarbons / Q000737:chemistry*; D056951:Photoelectron Spectroscopy / Q000379:methods*; D056928:X-Ray Absorption Spectroscopy / Q000379:methods*
chemical_list: D006838:Hydrocarbons